With the Yanshan mountains on the northwest and the North China Plain and ocean adjacent on the southeast, Beijing has a warm temperate semi-humid monsoon climate with four distinct seasons: dry and windy spring, hot and rainy summer, clear and crisp autumn, cold winter with little snow. Beijing has short springs (two months) and autumns (one and a half months) and long summers (three months) and winters (over five months).

Temperatures rise rapidly with large variance between day and night in spring when it rarely rains or snows but is frequented by dry weathers and strong winds accompanied by floating dust, flying sand or sandstorms. Scarce precipitation has earned Beijing a fame of "10 years 9 droughts". In the hot summer heat it rains often. Though July is the warmest month, most extreme high temperatures occur in June. About 70 percent of the yearly precipitation comes in summer, often in heavy downpours and causing mountain torrents and plain waterlogging. Autumn is the best season of the year: always clear and crisp, neither too cold or too hot, and endowed with adequate sunshine, pleasant weather and the best air quality. From December to February in the cold and dry winter, the monthly mean temperatures fall below 0 C; and the precipitation is only two percent of the year, often with record high zero precipitations for over a month.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

10242

10220

10174

10100

10057

10012

9997

10037

10105

10167

10214

10238

Pressure (hPa)

10242

10220

10174

10100

10057

10012

9997

10037

10105

10167

10214

10238

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

25.3

30.7

42.4

57.5

67.8

75.9

79.1

76.8

68

55.5

40.2

29.3

Temp(oC)

-3.7

-.7

5.8

14.2

19.9

24.4

26.2

24.9

20

13.1

4.6

-1.5

Temperature (oC|oF)

-3.7 oC 25.3 oF

-.7 oC 30.7 oF

5.8 oC 42.4 oF

14.2 oC 57.5 oF

19.9 oC 67.8 oF

24.4 oC 75.9 oF

26.2 oC 79.1 oF

24.9 oC 76.8 oF

20 oC 68 oF

13.1 oC 55.5 oF

4.6 oC 40.2 oF

-1.5 oC 29.3 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

16.8

21.9

32.7

46.2

56.4

65.8

71.6

69.4

58.6

46.2

32

21.5

Min Temp (oC)

-8.4

-5.6

.4

7.9

13.6

18.8

22

20.8

14.8

7.9

0

-5.8

Max Temp (oF)

35.2

41

52.8

68.5

78.8

86.3

87.6

85.4

78.4

66.3

50.1

38.6

Max Temp(oC)

1.8

5

11.6

20.3

26

30.2

30.9

29.7

25.8

19.1

10.1

3.7

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

-1

3.2

5

26.2

36.6

49.6

61.8

52.5

39.7

25.7

12.9

3.9

Min Temp (oC)

-18.3

-16

-15

-3.2

2.6

9.8

16.6

11.4

4.3

-3.5

-10.6

-15.6

Max Temp (oF)

55.2

67.6

79.5

91.4

98.2

102.5

107.4

96.9

93.9

84.7

71.6

67.1

Max Temp (oC)

12.9

19.8

26.4

33

36.8

39.2

41.9

36.1

34.4

29.3

22

19.5

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

44

44

46

46

53

61

75

77

68

61

57

49

Hunidity (%)

44

44

46

46

53

61

75

77

68

61

57

49

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

0

0

0

0

2

0

3

13

8

0

0

3

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

2.7

4.9

8.3

21.2

34.2

78.1

185.2

159.7

45.5

21.8

7.4

2.8

Days (Precipitation<0.1mm)

1.8

2.3

3.3

4.3

5.8

9.7

13.6

12

7.6

5

3.5

1.7

Days (Precipitation<10mm)

0

.1

.2

.7

1.1

2

5

3.9

1.6

.5

.1

0

Days (Precipitation<25mm)

0

0

0

.1

.2

.9

2.5

2.2

.4

.2

0

0

Days (Precipitation<50mm)

0

0

0

0

0

.2

1

.8

0

0

0

0

Precipitation (mm)

2.7

4.9

8.3

21.2

34.2

78.1

185.2

159.7

45.5

21.8

7.4

2.8

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

14.6

20.2

58

40.4

58.7

139.2

109.8

156.2

51.3

43

22.2

12.8

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

2.6

2.8

3.1

3.2

2.9

2.5

2.1

1.8

2

2.1

2.4

2.6

Wind Speed (m/s)

2.6

2.8

3.1

3.2

2.9

2.5

2.1

1.8

2

2.1

2.4

2.6

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

20

18

20.7

21.7

21.3

15

21.7

12.3

12.7

17

16.7

19

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

194.1

194.7

231.8

251.9

283.4

261.4

212.4

220.9

232.1

222.1

185.3

180.7

Duration (hour)

194.1

194.7

231.8

251.9

283.4

261.4

212.4

220.9

232.1

222.1

185.3

180.7

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

65

65

63

64

64

59

47

52

63

64

62

62

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.